I'm among those who love TLJ as I thought it was, individually, an absolute masterpiece. The problem with the movie is that as a part of a trilogy, Rian closed off most plot lines, although there was certainly a better way to handle it than how JJ did with RotS, which was basically just throwing canon to the wind and saying screw it.
I do blame LucasFilm for not having an overall vision and for not delaying the film because they wanted to get a film out every two years. Think about it, had they delayed it, it would've been pushed into 2020 and then ultimately 2021 or 2022, meaning a hell of a lot more time to give the movie the love it deserved. It probably still would've sucked, but who knows. Maybe they take the Covid break to re-write and reshoot some scenes to improve on a rushed product.
As for superfluous content you mention that we aren't getting from Marvel, i'd argue that Black Widow and literally every Disney+ show is unnecessary. Sure, the Disney+ shows help to introduce us to more characters or to flesh out existing ones, but lets be real, they only exist to keep people subscribed to Disney+.